In modern industrial hydraulic systems, oil cleanliness is directly related to equipment life and operational safety. When the filter element is gradually clogged due to impurity accumulation, the differential pressure transmitter CMS-I becomes the “first line of defense” to ensure the stable operation of the system with its precise monitoring and immediate warning functions.

1. The “nerve endings” of differential pressure monitoring: the working principle of CMS-I

The CMS-I differential pressure transmitter evaluates the filter element status in real time by sensing the pressure difference changes at the inlet and outlet of the oil filter. When the contaminants in the oil gradually clog the filter element, the inlet and outlet pressure difference continues to increase. Once the pressure difference reaches the preset threshold, the piston inside the transmitter triggers the switch action under the pressure push, and the red indicator button pops up at the same time, forming a “visual + electrical signal” dual alarm mechanism. This design not only reduces the risk of system failure caused by filter element failure, but also provides intuitive maintenance guidance for operators.

From the internal structure, CMS-I consists of a piston, a magnet, a spring and a contact assembly. Under normal conditions, the piston is close to the oil inlet side, and the red button is sucked into the transparent window; when the pressure difference exceeds the standard, the piston moves to the oil outlet side, compresses the spring and activates the contact, the normally open point turns to a closed state, and the button pops up to form a mechanical alarm. This combination of mechanical and electronic signals ensures the reliability of the alarm – even if the circuit fails, the visual signal can still take effect.

2. Multiple protection mechanisms: Why can CMS-I become the “first line of defense”?

Early warning, prevent trouble before it happens

Once the hydraulic system causes a sudden increase in pressure due to filter element blockage, it may cause serious accidents such as pump damage and pipeline burst. CMS-I monitors the pressure difference change in real time and issues an early warning at the beginning of filter element blockage, leaving sufficient processing time for maintenance personnel. For example, in a hydraulic station of a steel enterprise, CMS-I warned of filter element blockage 3 days in advance, avoiding hydraulic valve group failure caused by oil contamination, and directly reducing downtime losses by more than 500,000 yuan.

High reliability design, adaptable to complex working conditions

CMS-I adopts modular design, supports multiple alarm modes such as visual and electrical signals, and can be customized according to system pressure and temperature. Its internal magnetoelectric coupling technology effectively avoids electromagnetic interference, and the contact capacity covers the diversified needs of AC220V/0.25A to DC30V/2A, meeting the application scenarios from small engineering machinery to large ship hydraulic systems.

A cement plant hydraulic station once failed to replace the filter element for a long time, which eventually caused the hydraulic pump to burn out. After analysis, it was found that the piston of the transmitter was stuck by oil mud, and no regular reset verification mechanism was set. This incident prompted the industry to strengthen the maintenance specifications of CMS-I:

Regular calibration: It is recommended to check the button reset function every quarter to ensure that the mechanical alarm channel is unobstructed;

Intelligent monitoring upgrade: Connect a temperature sensor in series with the transmitter contact, and automatically lock the alarm signal when the ambient temperature is abnormal to avoid false alarms;

Filter element life management: Combine the pressure difference-time curve to analyze the filter element attenuation trend and achieve preventive replacement.

Although the pressure differential transmitter CMS-I is small in size, it carries the “lifeline” of hydraulic system safety. Through continuous technological innovation and standardized operation and maintenance, this “first line of defense” is shifting from passive warning to active protection, providing a solid guarantee for the continuous and stable operation of industrial equipment. As a construction machinery manufacturer said: “CMS-I is not only an alarm device, but also our intelligent partner in fighting equipment failures.”

When looking for high-quality, reliable differential pressure transmitters, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:

E-mail: sales@yoyik.com
Tel: +86-838-2226655
WhatsApp: +86-13618105229

Yoyik offers various types of spare parts for steam turbines, generators, boilers in power plants:
RTD Sensor WZPM-301
Braun Card D42151U1
Sensor Temperature Bearing, RTD PT100 WZP-014S
Cable grips XY2CZ524
Speed sensor ZS-04-075-3000
OIL FILTER DP TRANSMITTER VL5GW2.1/123A5
INVERTER ACS550-01-031A-4
VIBRATION SENSOR SZ-6T
Gas Detector ES2000T MC 00000710
Collision Switch XCK-L106
DIODE R6W02033V0
Pressure reducing valve PQ-235C
velocity vibration sensor HD_ST_A2_B1
SWITCH OUTPUT MODULE 1756-0B16E
Hydrogen leakage sensor NA1000DII
IGNITER SPARK ROD XDZ-1R-1800/16
Analog Output Module XGF-DV4A
LVDTsensor 6000TDGNK
SENSOR SPEED MGAXYFFMSP6715
PS Board CS057210P
Level switch YKJD24-150-300
LVDT DFA-LVDT-100-6
Turbine TSI Safety Monitor A6120
Power supply HSDS-30/D
Guide vane opening meter DYK-11-5013
Position Sensor SP2841 100 002 001
THERMOCOUPLE 158.91.10.01+2
PT-100 WZPK-330
ROTATIONAL SPEED SENSOR CS-1-L120
CHAIN SCRAPPER GT2160607